An Etymological Dictionary of the German Language/lugen

by Friedrich Kluge

lugen, vb., ‘to look out, spy,’ from the equiv. MidHG. luogen, OHG. luogên; corresponding to OSax. lôcôn, AS. lôcian, E. to look, with an abnormal k for g. From these Norman luquer is borrowed. The early history of this West Teut. stem lôkai, lôgai-, is obscure.